Prime cold rolled steel outer shell. High impact styrene insert with 4 fixed vertical compartments and 9 movable dividers adjustable on 1″ centers (divides the container into 4 equal sections 4 1/8″ wide). Full piano hinge on cover provides rigidity. Positive pull down catch keeps cover tightly closed to prevent part migration. Handle allows for easy transport. Durable gray powder coat finish. Overall size: 18″ x 12″ x 3″.